Malicious PDF — malware analysis report

Static analysis result for SHA-256 419bc647ea98899a…

MALICIOUS

PDF

74.0 KB Created: 2021-03-12 19:25:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: df227b899173566bb462c797a7f10b90 SHA-1: 976a1ae8de0fbfbcf27cc1ee7edb610173331f76 SHA-256: 419bc647ea98899a580ca88f663b2e0775fd55777aeb9f5fdc738c580c289fe6
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded URLs pointing to disposable domains, indicative of a link farm used for phishing or malware distribution. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the presence of external URIs and the 'link farm' heuristic indicate the document's primary purpose is to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://baarspo.ru/wix?keyword=how+to+make+a+click+track+in+ableton PDF link annotation
    • http://lightsex.ru/the_power_of_now_quotes_with_page_numbersvrg5h.pdfIn PDF document text
    • http://nexofozupugasi.mywebcommunity.org/icebreakers_for_kids_online.pdfIn PDF document text
    • http://jesubenodewopob.22web.org/43841685933.pdfIn PDF document text
    • http://arbitestpark.xyz/how_to_create_contrast_in_artymgkm.pdfIn PDF document text
    • http://mowefopovog.mywebcommunity.org/bay_area_buggs_gta_5_sapdfr.pdfIn PDF document text
    • http://meetplafond.xyz/87025025217e0r3c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460072/normal_5fea45cf71beb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484356/normal_5fe9d8ff4e797.pdfIn PDF document text
    • http://snt-br.ru/star_trek_starship_modelsfleg7.pdfIn PDF document text
    • http://eroganoficial.site/fadijazurl5.pdfIn PDF document text
    • http://ponarolo.22web.org/caledonia_mining_annual_report.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379971/normal_5fd61fb65dac4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470019/normal_5ffb443233374.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414680/normal_60284136672af.pdfIn PDF document text
    • http://rigoditibalun.mywebcommunity.org/87835108134.pdfIn PDF document text
    • http://daddytestit.xyz/87029780319ibhk3.pdfIn PDF document text
    • http://tuimag.ru/sims_2_castaway_pc_freenjh81.pdfIn PDF document text
    • http://alkim.xyz/portent_of_disastercidha.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://dizavinizekabos.rf.gd/nodufomabelazir.pdfIn PDF document text
    • http://zivuneko.epizy.com/balloon_tower_defense_3_apk.pdfIn PDF document text
    • https://992bddda-184d-467f-a815-0165b41a2208.filesusr.com/ugd/69695d_b36188974f0240049559dc66102cad98.pdf?index=trueIn PDF document text
    • https://6b137298-3864-41c5-aaa3-11744000c3c2.filesusr.com/ugd/b916f4_7d4f68cfa08c44e385162e31861d7906.pdf?index=trueIn PDF document text
    • https://6478d21b-237c-41b5-add8-96d7b9819624.filesusr.com/ugd/c7ef1a_8913de3c80fd49099cea4ff45f9ab464.pdf?index=trueIn PDF document text
    • https://5f98d79b-b704-4ecc-a618-200e52db7f79.filesusr.com/ugd/d1a5b7_5b6dd7f4d66b479e90c173c190bdfb37.pdf?index=trueIn PDF document text
    • https://238a82c5-85a8-4641-a991-2f0f5270ddc4.filesusr.com/ugd/63f22d_84bf21a7032e41d0bd5e4bd1316281fb.pdf?index=trueIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d8c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8C4 4812 bytes
SHA-256: c88bf5f08c3353d1dff02205699dfaf3c3ba0b5f06f31bb04c40d0f59eb24670
font_01_sfnt_off0000e90c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE90C 10264 bytes
SHA-256: 70b955dd7838b61e7bbec919f9ebae0921d7b9592641a74f3fadbe0cf7b8359e
font_02_sfnt_off00010c3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C3C 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34